Supersnelle erbijsommen en erafsommen tot 20
In de mix
|
1.
13 + 1 =
2
3
14
1
|
2.
11 + 4 =
15
2
3
1
|
3.
13 + 0 =
1
2
13
3
|
4.
2 + 13 =
1
15
3
2
|
|
5.
12 – 4 =
3
2
1
8
|
6.
10 + 1 =
1
11
2
3
|
7.
4 + 13 =
2
4
17
3
|
8.
12 – 4 =
8
2
1
3
|
|
9.
1 – 1 =
4
3
0
2
|
10.
17 + 2 =
4
3
19
2
|
11.
10 + 9 =
19
3
2
4
|
12.
1 + 6 =
7
3
1
2
|
|
13.
7 – 6 =
4
3
1
2
|
14.
1 – 0 =
3
2
4
1
|
15.
6 – 1 =
3
1
2
5
|
16.
8 – 2 =
3
2
1
6
|
|
17.
17 – 1 =
3
2
16
4
|
18.
11 + 4 =
15
3
2
1
|
19.
3 + 6 =
2
9
1
3
|
20.
17 + 1 =
4
18
2
3
|